Exploring Exceptions in WCAG Success Criteria
Success Criteria with Contrast Exceptions
Summary of Contrast Success Criteria
The contrast of text, including text in images, and its background needs to meet a certain contrast ratio
Key Terms in Contrast Success Criteria
- contrast ratio
- Color theory stuff; just use a tool to calculate it.
- large scale (text)
- Complicated font stuff; just use a tool that also considers size.
Contrast Exceptions
- Large Text
- Larger text can have a slightly lower contrast ratio
- Incidental
- inactive interactive control text
- decorative element text
- invisible element text
- text in images, where the text isn't important
- Logotypes
- Logos and brand names
Examples
- Random words used to create a background and not for their meaning
- Person's name on a nametag in a photograph
- Inactive links, inputs, or controls
- Previous link in pagination section where the link is inactive
- Logos for a business, product, etc.